JP2003126172A - Wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sitting posture, by lowering the sitting site suitable for a handicapped person with impairment in upper or lower limbs, and to facilitate transferring of the user to the wheelchair from a bed or other furniture. SOLUTION: This wheelchair 1 can be folded by means of a pair of links 14, 14 which rotate in a horizontal direction, and the width of its seat can also be changed by means of width adjusting means 18. A seat section 9 is provided with a floor board 12 which consists of a front seat section 12f for supporting a body portion from a knee back to a femoral region, and the rear seat section 12b being formed in different level steps in a lower position than that of the front seat section 12f. While armrest device 11 is pivotally supported at the end of a back frame 7 of a base frame 4 through a rotatable support mechanism 28 detachably mounted, the end of a foot frame 6 in the mounting position is detachably supported by means of locking mechanism 29. An elbow pad member 27 has such a shape that the user can easily grasp it in the near part of the tip opposing the mounting position of the foot frame 6. In addition, the elbow pad member 27 can be maintained in the desired level by means of height adjusting mechanism 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair device capable of improving a sitting posture, reducing a seating surface for a user having an obstacle in upper and lower limbs, and facilitating transfer from a bed or the like. It is a thing.

[0002]

2. Description of the Related Art Conventionally, wheelchair devices have been indispensable equipment for the elderly, patients with serious illness, and people with walking disabilities. In such a wheelchair device, there is a standard size that is easy for most users to use, and the design is made based on this standard size. For example, there are a seat width and a seat height as seat dimensions. The seat width should be 3-5 cm wider than the buttocks, and if it is too wide,
The lateral stability in the sitting position is poor, the position of the hand rim is far,
Get higher Also, since the seat height is related to the foot landing property,
is important. The seat depth is also one of the important factors. That is, if the seat depth is too short, the area supporting the thighs is reduced, resulting in concentration of pressure. On the other hand, if it is too long, the front end of the seating surface hits the back of the knee, causing pain and impaired blood circulation.
Also note the arm height (height of the armrest). That is, if the arm height is too low, it causes a collapse of the posture. On the other hand, if it is too high, it may cause stiffness and pain in the shoulder.

[0003]

However, even if the products are manufactured so as to meet the above-mentioned standards, the
There is still room for improvement to adapt to various usage environments. For example, when trying to approach a general table, the armrest becomes an obstacle, and it is difficult to approach. Moreover, it is not very satisfactory for use with severe lower limb disorders. The present invention has been proposed in order to comprehensively improve such problems, and with the improvement of the sitting posture, a low sitting surface is aimed at for a user having an obstacle in the upper and lower limbs, and further various An object of the present invention is to provide a wheelchair device that facilitates transfer to and from equipment.

[0004]

In order to solve the above-mentioned problems, according to the present invention, in claim 1, a front wheel, a base frame equipped with a rear wheel having a diameter larger than that of the front wheel, and a base frame are provided. A foot frame that holds a footrest protruding forward of the front wheel, a back frame that extends above the rear wheel from the base frame, and a rear frame attachment location on the base frame that extends from near the back frame attachment location to the foot frame attachment location A pair of links including a seat portion and armrest devices arranged on both side surfaces of the seat portion, and both frames supporting the seat portion intersect each other substantially at an intermediate position and are axially rotatably pivoted. And a wheelchair device configured to be foldably connected by a folding mechanism configured by a restraining means that restrains the rotational movement of these links. Further, in the present invention, in claim 2, there is disclosed a wheelchair device in which the restraint means is provided with a seat width adjusting means for adjusting a seat width by adjusting an opening / closing degree of the pair of links. According to the present invention, in claim 3, the seat is
Disclosed is a wheelchair device having a seat plate for supporting a cushion part, which is arranged at a sitting position, and a part of the seat plate for supporting a lumbar part is configured as a rear seat part having a lower position than other parts. To do. Further, according to the present invention, in claim 4, the cushion portion that supports the seat plate is provided with a protruding portion that is placed so as to fill the rear seat portion of the seat plate, and the appropriate position of the outer surface of the cushion portion can be opened and closed. Disclosed is a wheelchair device in which a padding can be replaced according to a user by forming an opening. Further, according to the present invention, in claim 5, the cushion portion supporting the seat plate is provided with a projecting portion to be mounted so as to fill the rear seat portion of the seat plate, and an appropriate place of the projecting portion is opened and closed. Disclosed is a wheelchair device in which an opening is configured so that a padding can be replaced depending on a user. Further, in the present invention, in claim 6, between the seat plate that constitutes the seat part and the base frame on which the seat plate is placed, the support angle from the part supporting the waist part of the cushion part to the part corresponding to the back of the knee. A wheelchair device including a spacer member that can change Further, in the present invention, in claim 7, the armrest device includes a support member arranged along the side surface of the seat portion, and an armrest member attached to the support member, and the support member is provided on the base frame. , The seat back side end is pivotally supported while the front side end is detachably restrained, and a lock mechanism is provided to rotate the support member together with the armrest member around the seat back side end. Disclosed is a wheelchair device which is moved to open a side surface of a seat portion of the chair or the like. Further, according to the present invention, in claim 8, the support member in the armrest device is formed in a substantially U shape by bending both end sides, and is provided in the middle of the support member and a guard panel which is held between the both ends. Disclosed is a wheelchair device configured to hold the elbow rest member at a desired height position by a height adjusting mechanism from a holding body to a guard panel via a column. Further, in the present invention, in claim 9, the armrest member in the armrest device is configured so as to correspond to a user's elbow to a wrist, and at a location corresponding to the position of the user's hand of the armrest member. A wheelchair device having a waist is disclosed. Further, in the present invention, in claim 10, the elbow rest member in the armrest device is configured so as to correspond to the user's elbow and wrist, and the tip end portion corresponding to the position of the user's hand of the elbow rest member. Disclosed is a wheelchair device in which a protruding surface portion corresponding to the palm is formed. Further, in the present invention, in the eleventh aspect, the armrest member in the armrest device is configured so as to correspond to a user's elbow to a wrist, and at a location corresponding to the position of the user's hand of the armrest member. Disclosed is a wheelchair device in which a constricted portion is formed and a protruding surface portion corresponding to the palm is formed.

According to the first aspect of the present invention, when the frame is not in use, the restraint means is released and both frames are pushed close to each other.
The pair of links can be displaced so as to close each other in the horizontal direction and can be in a folded state.

According to the second aspect, depending on the user, the seat width adjusting means of the restraining means for restraining the rotational movement of the link can adjust the opening / closing degree of the pair of links to adjust the seat width. it can.

According to the third aspect, the user can maintain a stable posture at the sitting position by the seat plate through the cushion member. At this time, the location of the ischium in the buttocks is supported by the rear seat of the low-position structure, so that the body pressure applied to the ischium can be dispersed.

According to the fourth aspect, the user can maintain a stable posture by the seat plate through the cushion portion at the sitting position. At this time, the location of the ischium in the buttocks is supported by the rear seat of the low-position structure, and the body pressure applied to the ischium can be dispersed by the repulsion of the cushion portion. The cushion portion can change the resilience by changing the filling through the opening according to the user.

According to the fifth aspect, the padding of the rear seat portion and the cushion portion is changed by exchanging the padding according to the user through the opening of the protruding portion of the cushion portion which is placed so as to fill the rear seat portion. With the cushioning property, it is possible to more effectively disperse the body pressure from the ischium.

According to the sixth aspect, it is possible to change the support angle from the portion supporting the waist of the cushion portion to the portion corresponding to the back of the knee.

According to the seventh aspect, the user can maintain a stable posture in the seat portion by using the elbow rest member mounted on the support member arranged along the side surface as a support. When moving from the seat to another place, operate the lock mechanism to release the front end of the support member, and rotate the support together with the armrest member around the seat back end. Then, the side surface of the seat portion of the chair or the like is opened.

According to the eighth aspect, the user adjusts the elbow rest member at the sitting position by adjusting the elbow rest member attached to the support member arranged along the side face to a height position where it is easy to use. You can maintain a stable posture as a support.

According to the ninth aspect, the user can not only maintain a stable posture with the elbow support member as a support at the sitting position, but also can grasp the constricted portion on the tip side of the elbow support member. , Will be easy to fit in your hand.

According to the tenth aspect, in the sitting posture, the elbow rest can be placed on the elbow rest member from the elbow to the wrist, and can be grasped without a feeling of discomfort while the palm is applied to the projecting surface portion on the distal end side.

According to the eleventh aspect, in the sitting posture, the elbow rest can be placed on the elbow rest member from the elbow to the wrist, the constricted portion on the distal end side can be grasped, and the palm can be grasped comfortably with the palm on the projecting surface. .

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a wheelchair device according to the present invention will be described below with reference to one embodiment and with reference to the accompanying drawings. A wheelchair 1 is shown in FIG. 1. In this wheelchair 1, a front wheel 2, a base frame 4 having a rear wheel 3 having a diameter larger than that of the front wheel 2, and a base frame 4 are mounted.
A foot frame 6 that holds a foot rest 5 protruding forward from the front wheel 2, and a base frame 4 to a rear wheel 3.
Along the back frame 7 and the back frame 7 extending upward, the handle portion 8 connected to the back frame 7, the seat portion 9 arranged from the vicinity of the attachment position of the back frame of the base frame 4 to the attachment position of the foot frame 6, and the back frame 7. The armrest device 11 is disposed on both side surfaces of the seat portion 9.

The base frame 4 holds the width dimension of the seat portion 9 of both base frames 4 facing each other in the width direction immediately below the seat plate 12 of the seat portion 9 or both base frames 4 in the width direction. The wheelchairs 1 are connected to each other by a folding mechanism 13 that brings the wheelchairs 4 close to each other (see FIG. 2). The folding mechanism 13 is provided with a pair of links 14 and 14 that are axially fixed to each other so as to be horizontally rotatable about a rotation axis a by intersecting each other at substantially the middle (see FIG. 3). These links 14 are connected to each other via both frames 4 and rotational fixed ends E1 and moving ends E2 movably mounted on guide rails (described later) provided on opposite sides of both frames 4, respectively. is doing. The rotary fixed end portion E1 is vertically attached to a projecting piece 15 protruding from the lower and upper parts of the base frame 4 in the vicinity of the foot frame 6 mounting location of both base frames 4, and the fixed shaft As.
It is attached to be freely rotatable. On the other hand, the moving end E2
Is an appropriate mover (not shown) along the guide rails 16 attached to the inner sides of the upper and lower portions of both base frames 4 from the intermediate side to the mounting side of the back frame 7.
It is mounted so that it can be moved freely through.

In addition, the width of the wheelchair 1 is maintained by restraining the rotational movement of the pair of links 14 and 14 at a position from the rotational axis a of the link 14 of the folding mechanism 13 to the moving end E2. Restraining means 17 to be changed with
Is provided. The restraint means 17 has a uniform length from the rotation axis a of each of the links 14 to the moving end portion E2 and is connected to the vicinity of one end side of each of the links 14 via a seat width adjusting means 18. 1 restraint link 19a
And the second restraint link 19b. Also, the other end side of these first and second restraint links 19a, 19b is
They are connected to each other by the operation shaft 20. This operation axis 2
At 0, the grip portion 20 for urging the bending displacement around the operation shaft 20 on the other end side of the first and second restraint links 19a and 19b is grasped.
have h. Furthermore, the first and second restraint links 19a,
A holding member for holding the first and second restraint links 19a and 19b in a minute angle bending state on the other end side of one of 19b on the opposite side to the moving direction of the moving end portions E2 of the pair of links 14. The edge 21 is curved (see FIG. 5).

The seat width adjusting means 18 is provided with a pin member 22 projecting from the rotation axis a of each of the links 14 to the moving end E2, and the first and second restraint links 19a and 19b. Near one end side of the
Along with the axial direction of the second restraint links 19a and 19b, a plurality of locking holes 23p for locking the pin member 22 in a selectively detachable manner are formed in series, and an adjusting elongated hole 23 is formed. There is. The seat width adjusting means 18 is operated to change the seat width of the wheelchair 1 to, for example, 417 mm,
The setting is 400 mm and 380 mm.

Although not described in detail, both of the foot frames 6 holding the foot rests 5 will not be described in detail, but as shown in FIG. 6, the base frame 4 is attached to the foot frame 6 on the front side of the seat portion 9 in the base frame 4. 4 The shaft is fixed so that it can be deployed from the inside to the outside in the width direction. Further, also in the footrest 5, the foot frame 6 is pivotally fixed to the tip end side of the foot frame 6.

Next, the seat 9 will be described. The seat portion 9 is a seat plate 12 detachably mounted on the base frame 4 by fixing means such as bolts, and the seat plate 1
2 and the cushion part 24 placed on the upper part 2 (see FIG. 7). The seat plate 12 is formed by pressing and welding a steel plate, for example, and is placed on both base frames 4 and is positioned near the side edge portions 12s to be bolted and the foot frame 6 mounting position. The front seat 12f that supports the back of the knee to the thigh and the rear seat 12 that supports the waist by forming a step at a lower position than the front seat 12f.
b. These front seat part 12f and rear seat part 1
A plurality of ventilation holes h ′ are formed in 2b. Also,
The front seat portion 12f, the side edge portion 12s, and the rear seat portion 12b are
Ribs R for preventing shift of the cushion portion 24 are formed respectively. Further, the center of the front seat 12f close to the rear seat 12b, the side edge 12s close to the back frame, and the rear seat 12
A rubber Ru for holding the cushion portion 24 so as not to slip is attached to the rear edge portion of b.

The side edge portion 12s of the seat plate 12 is
And the base frame 4 between the front seat portion 1 of the seat plate 12
It is also possible to interpose a spacer member 25, which is a wedge-shaped strip-shaped member formed thickly from 2f to the rear seat portion 12b, for switching the upper surface inclination degree of the cushion portion 24 (described later).

The cushion portion 24 is a well-known moderately stuffed material (described later) covered with a surface material such as vinyl leather, and has a bottom surface so that it can be engaged with the seat plate 12 without any gap. A protrusion 24a corresponding to the seat 12b is provided. On the other hand, the upper surface is inclined so as to form a slight depression angle from the portion corresponding to the front seat portion 12f to the portion corresponding to the rear seat portion 12b (see FIG. 8). On the bottom surface of the cushion portion 24 corresponding to the front seat portion 12f,
An opening O having a predetermined length is formed, and in this opening O, for example,
A fastener F1 is attached so that it can be opened and closed (Fig. 9).
reference). Further, an opening O is formed along the end face of the protruding portion 24a facing the back portion 10 side, and a fastener F2 is attached to the opening O so as to be opened and closed (FIG. 10).
reference).

Here, the padding of the cushion portion 24 will be specifically exemplified. That is, examples of the filling material include urethane foam, chip urethane, low-resilience foam urethane, and pressure dispersion gel.

Further, the armrest device 11 will be described. As shown in FIG. 11, the armrest device 11 includes a support member 26 arranged on the base frame 4 from the vicinity of the attachment portion of the back frame 7 to the attachment portion of the foot frame 6, and an elbow pad attached to the support member 26. The support member 26 is provided with a member 27, and the support member 26 rotates and attaches and detaches an end portion of the base frame 4 on the back frame 7 side.
While being pivotally supported via 8, the end portion on the side where the foot frame 6 is attached is detachably supported via a lock mechanism 29.

Here, the support member 26 is made of a pipe material, and is bent at both ends so as to be formed into a substantially U-shape. The guard panel 30 is held between the both ends and an intermediate portion of the support member 26. The armrest member 27 is supported by a height adjusting mechanism 33 so as to be adjustable in height from a holder 31 provided in the center of the guard panel 30 to a central portion thereof. The support member 26 is not limited to the pipe material, and may be a rod-shaped member formed in the U-shape. Further, the whole plate may be used without using the guard panel.

The elbow support member 27 is made of a well-known synthetic resin molded body, and the details will be described later, but the user can place the elbow support member 27 near the front end of the wheelchair 1, that is, toward the foot frame 6 attachment point side. Shaped for easy grip.

Next, the rotating attachment / detachment support mechanism 28, which is provided at the end of the base frame 4 near the back frame 7 as described above, is positioned on the back frame 7 side of the support member 26. The relay member 34 is axially fixed to the end K1 to
The relay member 34 is detachably supported on a receiving case 35 mounted on the end of the base frame 4 by an attachment / detachment operation mechanism 36 (see FIGS. 12 and 13). The attachment / detachment operation mechanism 36 includes the relay member 3 in the receiving case 35.
4 has a fitting groove 37 for receiving 4 and a pin hole 38 formed so as to be orthogonal to the fitting groove 37, and a detachable pin 39 is inserted into the pin hole 38 to support the relay member 34 supported in the fitting groove 37. The detachable pin 39 is fitted into the insertion hole 34h by the coil spring 40 to restrain the relay member 34, and the detachable pin 39 is attached to the receiving case 35.
An attaching / detaching lever 41 is provided to retreat from the insertion hole 34h of the relay member 34 against the biasing force of the coil spring 40.

The lock mechanism 29 is fixed to the end of the base frame 4 on the side where the foot frame 6 is attached, and the front end K2 of the support member 26 is axially fixed to the front end K2. Lock housing 43 received via shaft 42
And a lock pin 45 which is held in the locking hole 44 provided in the conical shaft 42 by a biasing means (not shown) in the lock casing 43 so as to be always locked, and the lock pin 45 of the conical shaft 42. It is composed of a release lever 46 for engaging and disengaging from the locking hole 44 against the biasing force of the biasing means (see FIG. 14).

The lock housing 43 has a holding hole 47 on the upper surface for receiving the conical shaft 42, and the tip end side of the lock pin 45 is brought into the holding hole 47 by biasing means. The inner surface shape of the holding hole 47 corresponds to the conical shaft 42.

Then, the release lever 46 and the lock pin 4
5 means that when the release lever 46 is operated in the direction orthogonal to the lock pin 45, the tip end side of the lock pin 45 projects toward the holding hole 47.
When the lock pin 45 is operated so as to be aligned with the lock pin 45, the tip end side of the lock pin 45 is pivotally supported so as to retract from the holding hole 47 (see FIG. 11).

Next, the height adjusting mechanism 3 of the elbow rest member 27.
3 will be described. The height adjusting mechanism 33 includes the insertion hole 4 formed in the lower holding body 31 a that constitutes the holding body 31.
8 is formed so as to penetrate through the lateral hole 49 so as to be orthogonal to 8, and the column portion 3 is inserted into the through hole 48 of the holding body 31 from the lateral hole 49.
The height holding rod 50 is inserted into one of the plurality of adjusting holes h in FIG. 2 to hold the column portion 32 in that position and hold the elbow rest member 27 in a desired height position. It is configured (see FIG. 15). The holder 31
Is a connecting means for integrating the two pipe members constituting the support member 26 in the middle as described above, and is a lower holding body 31a.
And an upper holding body 31b, and a pipe member is sandwiched between the lower holding body 31a and the upper holding body 31b,
The connection bolts 51, 51 are used for fixing (see FIG. 18). Further, the insertion holes 48 provided in the lower holding body 31a and the upper holding body 31b are provided in the lower holding body 31a.
It is also formed in the column storage portion 52 of the guard panel 30 located immediately below.

The height-holding rod 50 extends from the lateral hole 49 in the lower holding body 31a to the insertion hole 48 in the lower holding body 31a.
A plurality of adjustment holes h (see FIG.
6, FIG. 17) and a shaft portion 50a which can be fitted into one of the adjustment holes h, and when the shaft portion 50a is fitted from the lateral hole 49 into the adjustment hole h of the support portion 32, the lower holding body is elastically engaged. It has a head 50b which is locked to 31a. In this case, the head 50b, as shown in FIG.
It is molded into a substantially cap shape by a well-known synthetic resin body having high elasticity, and has a central portion 53 to which the tip of the shaft portion 50a is attached, and a pair of locking pieces 54 integrally and deformably extending from the central portion 53. , 54. From the mounting portion of the shaft portion 50a of the central portion 53 to both locking pieces 5
4 and 54, the engaging surface 55 is formed in an arc shape having a predetermined curvature. On the other hand, on the surface of the lower holding body 31a where the lateral hole 49 is formed, a spherical surface 56 having a slightly larger radius of curvature than the radius of curvature of the engagement surface 55 of the head portion 50b.
Is formed.

The elbow pad member 27 is the back frame 7
From the rear end side facing the side to the front end side facing the foot frame 6 attachment point side which is the front side of the wheelchair 1, the shape is gradually reduced. That is, from the rear end side facing the back frame 7 side to the intermediate portion, the elbow riding portion 27a having a relatively wide upper surface U is formed in order to easily ride from the elbow portion of the upper limb to around the wrist (FIG. 20).

In addition, the width of the flat upper surface U is made narrower in order to make it easy to grip from above particularly from the intermediate portion to the tip side facing the mounting portion side of the foot frame 6 (see FIG. 2).
1), the elbow rest member 27 itself is a narrowed portion 27b. The constricted portion 27b is, for example,
It serves as a gripping point when gripping the entire elbow pad member 27 or when transferring from a bed to a wheelchair. For this reason, a concave finger-holding portion 27c when the constricted portion 27b is gripped is formed on the back surface side of the constricted portion 27b (see FIG. 22).
Of course, the constricted portion 27b may simply have a shape in which the elbow rest member 27 itself is relatively narrow.

The distal end side of the elbow rest member 27 is a distal end grip portion 27d which is wider than the constricted portion 27b so that the outer side extends in an arc shape toward the front of the wheelchair. A projecting surface portion 27e is formed on the top surface of the tip grip portion 27d so that the palm can be easily placed on the top surface. Furthermore, on the tip grip 27d, on the back side,
A concave finger rest 27f is formed when the tip grip portion 27d is gripped (see FIG. 23).

The wheelchair device 1 according to the present invention has been generally described above. Next, each function will be sequentially described below. When the wheelchair 1 is not in use and is stored, first the seat plate 12 in the seat portion 9 is
Remove from both base frames 4. Then, the pair of links 14, 14 in the folding mechanism 14 arranged immediately below the seat 9 is exposed. Next, the caregiver operates the restraint means 17 provided alongside the pair of links 14, 14 to assist the bending movement of the first and second restraint links 19a, 19b. That is, the caregiver holds the grip portion 20h on the operation shaft 20 of the restraint means 17 and applies a force in the moving direction of the moving end portions E2 of the pair of links 14 from the state held by the holding edge 21. Thereby, the pair of links 14, 14
Starts to displace around the rotation axis a, and the moving end E2 moves along the guide rail 16 from the middle side of the inner sides of the upper and lower sides of both base frames 4 to the mounting side of the back frame 7, At the same time, both base frames 4
The wheelchairs 1 can be folded in the width direction by pushing them toward each other (see FIG. 4), and space can be saved during storage (see FIG. 24).

By the way, when the physical constitution of the user does not fit the seat width of the seat portion 9, the restraining means 17 in the folding mechanism 14 is released and the seat width adjusting means 18 is operated.
First, the grip 20h on the operation shaft 20 of the restraint means 17
From the state of being held by the holding edge 21, that is, the state in which the pair of links 14 is bent at a slight angle in the opposite direction to the moving direction of the moving ends E2 of the links 14, from the moving direction of the moving ends E2 of the pair of links 14. Apply force. As a result, the pair of links 14, 14 start to be displaced around the rotation axis a, and the moving end E2 extends from the middle side of the inner sides of the upper and lower sides of both base frames 4 to the mounting side of the back frame 7. It can be moved along the guide rail 16.

In this state, the pin member 22 of the seat width adjusting means 18 projecting on the link 14 side is inserted into either one of the locking holes 23p of the adjustment slots 23 of the first and second restraint links 19a and 19b. By selectively locking (see FIG. 5), the grip portion 20h of the operation shaft 20 of the restraint means 17 is held.
And push it in the direction opposite to the moving direction of the moving end portion E2 to re-engage the first and second restraint links 19a and 19b.
By bringing the moving end portion E2 of the link 14 into a state in which the moving end portion E2 is bent at a slight angle to the opposite side,
It is possible to hold the distance between the both frames 4, that is, the seat width at a desired width by restraining the movements of 4 and 14. When mounting the seat plate 12 on both frames 4, the mounting hole Hv corresponding to the seat width is selected and bolted (see FIG. 3).

On the other hand, when using the wheelchair 1, the seat plate 12 can be fixed by placing the side edge portions 12s on both base frames 4 and bolting them. Next, the cushion portion 24 is attached to the rear seat portion 12 of the seat plate 12.
It is placed on the seat plate 12 so that the protrusion 24a is filled with b. At this time, the cushion portion 24 may be held so as not to slip by the rubber Ru attached to the center of the front seat portion 12f near the rear seat portion 12b, the side edge portion 12s near the back frame, and the rear edge portion of the rear seat portion 12b. Yes (see Figure 7).

When sitting on the seat portion 9 mounted as described above, the armrest device 11 is not sunk by the seat plate 12 through the cushion portion 24 having an appropriate resilience.
A stable posture can be maintained by the support of the elbow rest member 27 at. At this time, the location of the ischium in the buttocks is brought to the rear seat portion 12b, but the rear seat portion 12b is replaced by the front seat portion 12f.
Since a step is formed at a lower position as compared with the above, due to the cushioning property of the protrusion 24a of the cushion portion 24,
The body pressure applied to the sciatic bone can be effectively dispersed, and fatigue can be reduced even when sitting for a long time (Fig. 2
5).

By the way, when the cushion degree of the cushion portion 24 is too soft or too hard to obtain an appropriate cushioning property, the front seat portion 1 of the seat plate 12 is provided.
An opening O on the bottom surface of the cushion portion 24 corresponding to 2f is opened by the fastener F1 to change the material of the filling material (see FIG. 9). Further, the cushioning property of the protruding portion 24a of the cushion portion 24 that engages with the rear seat portion 12b of the seat plate 12 is also controlled by opening the fastener F2 in the opening portion O of the end surface of the protruding portion 24a facing the back portion 9 side to perform the filling operation. The desired cushioning property can be obtained by refilling (see FIG. 10).

The cushion portion 24 of the seat portion 9 is
The upper surface is from the portion corresponding to the front seat portion 12f to the rear seat portion 12b.
Since it is inclined so as to make a slight depression angle toward the portion corresponding to, when sitting, body pressure is applied to the back portion 9 side and the rear seat portion 12b side, and stability is increased.

If the user has a lower limb disease, a spacer member 25 may be arranged under the seat plate 12 to change the inclination angle of the upper surface of the cushion portion 24. It is possible to make it easier to rise from 9 (see FIG. 26).

Further, the user can maintain a stable posture with the elbow rest member 27 as a support by placing the elbow rest member 27 of the armrest device 11 on the seat portion 9 of the wheelchair 1 from the elbow to the wrist. At this time, the elbow rest member 27 has a relatively wide upper surface U from the rear end side facing the back frame 7 side to the middle portion.
Since it is set to 7a, the user can easily put it from the elbow portion of the upper limb to around the wrist. At this time, the hand is brought to the tip grip portion 27d on the tip side of the elbow support member 27, and the palm of the hand is placed on the protrusion surface portion 27d of the tip grip portion 27d.
It can be easily grasped by touching e and also by putting a finger on the back finger rest 27f (see FIG. 6).

At this time, if the height of the armrest member 27 is too high or too low, the height adjustment mechanism 33 can be operated to adjust the height of the armrest member 27. First, by holding the head 50b of the height holding rod 50, the lower holding body 3
The shaft portion 50a is pulled out from the adjustment hole h in the support column 32 by pulling it away from the spherical surface 56 of the surface on which the lateral hole 49 is formed in 1a. At this time, the elbow support member 27 is supported by one hand to support the shaft portion 5
Make it easy to pull out 0a (see FIG. 19). As a result, the support portion 32 of the elbow support member 27 is released from the restraint, and the support portion storage portion 5 of the guard panel 30 from the holder 31 is released.
The insertion hole 48 extending up to 2 can be freely moved up and down. Then, bring the armrest member 27 to a desired height,
The head 50b of the height holding rod 50 can be pushed in again, and the shaft portion 50a can be fixed by inserting another adjustment hole h in the support portion 32 from the lateral hole 49 in the lower holding body 31a (see FIG. 28).

In this way, the height of the elbow rest member 27 can be adjusted according to the user, so that the sitting posture can be maintained comfortably regardless of the physical constitution and physical condition of the user. .

When the user stands up on the spot, by gripping the constricted portion 27b of the elbow rest member 27,
The elbow support member 27 can easily stand up with the support (see FIG. 29). At this time, the width of the flat upper surface U of the constricted portion 27b is narrowed, and the user's finger is constricted in the constricted portion 2
Since it hits the finger hook portion 27c on the back surface of 7b, the waist portion 2 can be easily formed.
7b can be gripped (see FIG. 27).

When moving from the seat portion of the wheelchair 1 to another place, the front end K2 of the support member 26 is released by operating the release lever 46 of the lock mechanism 29 (see FIG. 14). , The support member 26 together with the armrest member 27,
The attachment / detachment pin 39 inserted by the coil spring 40 through the pin hole 38 is tilted and displaced in the insertion hole 34h of the reception case 35 supported by the reception case 35 of the end portion on the back frame 7 side and bounced. The seat is raised and the side surface of the seat is opened (see FIG. 30). It should be noted that both the foot frames 6 holding the foot rests 5 are attached to the foot frame 6 at the front side of the seat 9 in the base frame 4 at the mounting position of the foot frame 6.
It is axially fixed so that it can be deployed from the inside to the outside in the width direction, and is also pivotally fixed to the tip side of the foot frame 6 in the footrest 5 as well, so that the floor surface at the foot is widely opened, and when moving upright on the spot. In addition, the foot frame 6 and the foot rest 5 do not interfere (see FIG. 6).

Then, if necessary, the receiving case 35
By operating the attachment / detachment lever 25, the attachment / detachment pin 39 inserted into the insertion hole 34h of the receiving case 35 supported by
The armrest device 11 can be removed from the side surface of the seat by retracting it from the insertion hole 34h of the receiving case 35 against the biasing force of the coil spring 40 (see FIG. 3).
0).

[0051]

EFFECTS OF THE INVENTION According to the present invention, the sitting posture is improved, the seating surface is lowered for the user who has an obstacle in the upper and lower limbs, and further, the transfer between various equipments is facilitated.
A wheelchair device can be provided.

[0052]

[Brief description of drawings]

FIG. 1 is a side view showing an example of a wheelchair according to the present invention.

FIG. 2 is a plan view of the chair shown in FIG.

3 is a plan view of essential parts showing the configuration of the folding mechanism of the chair shown in FIG. 1 and showing a state where the seat width is maximized. FIG.

FIG. 4 is a plan view of relevant parts for explaining the operation of the folding mechanism shown in FIG.

FIG. 5 is an enlarged plan view of a pair of links and a restraint unit that constitute the folding mechanism shown in FIG.

6 is a plan view of relevant parts for explaining a function from a foot frame to a footrest of the wheelchair device shown in FIG. 1. FIG.

FIG. 7 is a perspective view of the seat shown in FIG. 1, showing a mounting position of a seat portion, and a seat plate, a cushion portion, and a spacer member of the seat portion.

8 is a side view of the cushion section shown in FIG. 7. FIG.

9 is a bottom view of the cushion section shown in FIG. 7. FIG.

10 is another side view of the cushion section shown in FIG. 7. FIG.

FIG. 11 is an enlarged side view of the main parts, showing the mounting structure of the armrest device in the wheelchair device shown in FIG. 1.

12 is an explanatory view of a main part showing a functional configuration of a rotation attachment / detachment support mechanism on a side closer to a back frame of the armrest device shown in FIG.

13 is a plan view of the rotation attachment / detachment support mechanism shown in FIG.

FIG. 14 is an external perspective view of a lock mechanism at the end of the armrest device of the wheelchair device shown in FIG. 1 on the foot frame attachment point side.

15 is a side view for explaining the function of the armrest device shown in FIG.

16 is a side view of an armrest member of the armrest device shown in FIG.

17 is a front view of the elbow rest member shown in FIG. 16. FIG.

18 is an explanatory sectional view showing the structure of a height adjusting mechanism of the armrest device shown in FIG.

19 is a plan view of the height adjusting mechanism shown in FIG. 18. FIG.

20 is a side view of an elbow rest member of the armrest device shown in FIG.

FIG. 21 is a plan view of the elbow rest member shown in FIG. 20 as seen from above.

22 is a sectional view taken along the line AA of the elbow rest member shown in FIG.

FIG. 23 is a bottom view of the elbow rest member shown in FIG. 22 seen from below.

FIG. 24 is a plan view of the chair shown in FIG. 1 in a folded state by operating the folding mechanism.

25 is an enlarged view of the seat portion of the wheelchair shown in FIG.
FIG.

FIG. 26 is an explanatory side view of the main parts, showing the state of the seat surface after the change of the seat portion according to the present invention.

FIG. 27 is a perspective view for explaining the use of the elbow rest member according to the present invention.

FIG. 28 is a perspective view of relevant parts for explaining the operation of the armrest device according to the present invention.

FIG. 29 is a perspective view for explaining the use of the elbow rest member according to the present invention.

FIG. 30 is an explanatory side view showing the process up to removal of the armrest device according to the present invention.

[Explanation of symbols]

1 wheelchair 2 front wheels 3 rear wheels 4 base frame 5 footrest 6 foot frame 7 back frame 8 handle 9 seats 10 back 11 Armrest device 12 seats 12f front seat 12b Rear seat 12s side edge 13 Folding mechanism 14 links 15 protrusions 16 Guide rail 17 Restraint means 18 Seat width adjustment means 19a First restraint link 19b Second restraint link 20 operation axis 20h grip 21 Holding edge 22 pin member 23 Adjustable slot 23p locking hole 24 Cushion 24a protrusion 25 Spacer member 26 Support members 27 Elbow support member 27a Elbow riding section 27b Constriction 27c Finger hook 27d Tip grip 27e Projection surface 27f finger rest 28 Rotating detachable support mechanism 29 Lock mechanism 30 guard panel 31 Holder 31a Lower support 31b Upper holding body 32 prop 33 Height adjustment mechanism 34 Relay member 34h insertion hole 35 receiving case 36 Detachment operation mechanism 37 Fitting groove 38 pin hole 39 removable pins 40 coil spring 41 Detachable lever 42 Conical axis 43 lock housing 44 Locking hole 45 lock pin 46 Release lever 47 holding hole 48 insertion hole 49 Horizontal hole 50 height holding rod 50a shaft 50b head 51 connecting bolt 52 Strut storage 53 Central 54 Locking piece 55 Engaging surface 56 spherical surface a rotation axis E1 Rotating fixed end E2 Moving end As fixed axis Hv mounting hole h'Ventilation hole R rib Ru rubber O opening F1, F2 fasteners K1 and K2 ends h Adjustment hole U upper surface

Claims (11)

[Claims] 1. A front frame, a base frame on which a rear wheel having a diameter larger than that of the front wheel is mounted, a foot frame holding a footrest projecting forward of the front wheel on the base frame, and a rear frame above the base frame. A seat frame that extends from the vicinity of the back frame attachment point of the base frame to the foot frame attachment point, and armrest devices that are placed on both side surfaces of the seat section. Both frames that support the part,
The folding mechanism is configured to be foldably connected by a folding mechanism that is configured by a pair of links that are axially fixed to each other so as to be capable of pivoting in the horizontal direction by intersecting each other at approximately the middle, and a restraining means that restrains the pivotal movement of these links. A characteristic wheelchair device. 2. The wheelchair device according to claim 1, wherein the restraint means is provided with a seat width adjusting means for adjusting a seat width by adjusting an opening / closing degree of the pair of links. 3. The seat portion has a seat plate for supporting the cushion portion, which is arranged at a seated position, and a portion of the seat plate for supporting the lumbar portion has a lower configuration than other portions. The wheelchair device according to claim 1 or 2, wherein the wheelchair device is configured as a rear seat portion. 4. A cushion part for supporting the seat plate is provided with a projecting part to be mounted so as to fill a rear seat part of the seat plate, and an opening part which opens and closes an appropriate place on the outer surface of the cushion part is formed. The wheelchair device according to claim 3, wherein the padding is configured to be replaceable according to a user. 5. A cushion part for supporting the seat plate is provided with a projecting part to be placed so as to fill the rear seat part of the seat plate, and an opening part for opening and closing a proper part of the projecting part is constructed. The wheelchair device according to claim 3 or 4, wherein the padding is configured to be replaceable according to a user. 6. A support angle can be changed from a portion supporting the waist portion of the cushion portion to a portion corresponding to the back of the knee between a seat plate constituting the seat portion and a base frame on which the seat plate is placed. The wheelchair device according to any one of claims 3 to 5, wherein a spacer member is interposed. 7. The armrest device includes a support member arranged along the side surface of the seat portion, and an elbow rest member attached to the support member, the support member being on the back side of the seat portion on the base frame. The chair is provided with a lock mechanism that detachably restrains the front end while pivotally supporting the end of the seat, and pivots the support member together with the armrest member around the end on the back of the seat. The wheelchair device according to claim 1, wherein the side surface of the seat portion of the wheelchair is opened. 8. A guard panel comprising a support member of the armrest device, the support panel being formed by bending both ends thereof into a substantially U-shape, and being held between the vicinity of both ends, and a holding member provided in the middle of the support member. The wheelchair device according to claim 7, wherein the elbow support member is attached to a panel and is held at a desired height position by a height adjusting mechanism via a column. 9. An elbow rest member of the armrest device is configured to correspond to a user's elbow to a wrist, and a constriction portion is formed at a position corresponding to the position of the user's hand of the elbow rest member. The wheelchair device according to claim 7 or 8, characterized in that. 10. The armrest member in the armrest device is configured to correspond to a user's elbow to wrist.
9. The wheelchair device according to claim 7, wherein a projection surface portion corresponding to a palm is formed at a tip end portion corresponding to the position of the user's hand of the elbow support member. 11. The elbow rest member of the armrest device is configured to correspond to a user's elbow to wrist.
The wheelchair device according to claim 7 or 8, wherein a constricted portion is formed at a position corresponding to the position of the hand of the user of the elbow rest member, and a projecting surface portion corresponding to the palm is formed.